a)13-18-(-42)-1513-18-(-42)-15

=13-18+42-1513-18+42-15

= (-18-18)+(42+42)+(-1513+13-15)

= -36+84+(-1500-15)

= -36+84+(-1515)

=  48+(-1515)

=  -1467

14 + 4 = 18     29 - 5 = 24

18 + 1 = 19     26 - 2 = 24

17 + 2 = 19     10 - 5 = 5

5 + 5 = 10     10 - 2 = 8

38 - 2 = 36     42 + 0 = 42

34 - 4 = 30     49 - 8 = 41

=8

=19

=19

=24

=24

=5

=10

=36

=30

=8

=42

=41 okk

70 : 7 = 10

28 : 7 =4

30 : 6 = 5

8 : 2 = 9

63 : 7 = 9

42 : 6 = 7

35 : 5 = 6

27 : 3 = 9

14 : 7 = 2

42 : 7 = 6

35 : 7 = 5

56 : 7 = 8.

hruyhy835y6n./ reuy786y7866

\(=\dfrac{1}{2}+\dfrac{5}{6}-\dfrac{1}{2}-\dfrac{5}{6}+2022=2022\)

2022

\(\dfrac{1}{2}-\dfrac{35}{-42}+2022-\dfrac{18}{36}-\dfrac{5}{6}\\ =\dfrac{1}{2}-\dfrac{-5}{6}+2022-\dfrac{1}{2}-\dfrac{5}{6}\\ =\left(\dfrac{1}{2}-\dfrac{1}{2}\right)-\left(\dfrac{-5}{6}+\dfrac{5}{6}\right)+2022\\ =0-0+2022\\ =0+2022\\ =2022\)

1)1/6 - - 5/6 = 1/6 + 5/6 = 1

2)6/13 - -14/39 = 6/13 + 14/39= 32/39

3)4/5 - 4/-18 = 4/5 + 4/18= 46/45

4)7/21 - 9/-36 = 7/21 + 9/36 = 7/12

5)-12/18 - -21/35  = -12/18 + 21/35 = -1/15

6)-3/21 - 6/42 = -2/7

7)-18/24 - 15/21 = -41/28

8)1/6 - 2/5 =-7/30

a) 5. 4 2  – 18: 3 2 =5.16 – 18:9 = 80-2 = 78

a. 37 x 5 -18  = 185 + 18                                  b. 42 : 6 + 84 =  7 + 84

                      =   167                                                               =   91